Lets stir some Ajax wizardry into a conventional Struts application, without all the sweat and bother of writing our own JavaScript. Struts 1 and Struts 2 both support Ajax taglibs that look and feel just like ordinary JSP tags. If it's just a little bit of Ajax that you want, these tags will get you around the learning curve in record time.

2. Struts on Ajax: Retrofitting Struts with Ajax Taglibs Square One University Series

12. public class IndexResult extends Action { public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { response.setContentType( "text/html" ); PrintWriter out = response.getWriter(); out.println( "Hello World! “ + “ This is an AJAX response “ + “ from a Struts Action." ); out.flush(); return null ; } } actions.IndexResult.java

13. public class IndexResult2 extends ActionSupport { private InputStream inputStream ; public InputStream getInputStream() { return inputStream ; } public String execute() throws Exception { inputStream = new StringBufferInputStream( "Hello World! This is an AJAX response " + "from a Struts 2 Action." ); return SUCCESS ; } } actions.IndexResult2.java

15. http://www.prototypejs.org/

16. http://jquery.com/

32. < html > < head > < title > Simple Hello World Example </ title > </ head > < body > < input id = &quot;hello-button&quot; type = &quot;button&quot; value = &quot;Say Hello World via AJAX&quot; /> < br />< br /> < div id = &quot;hello-div&quot; ></ div > </ body > </ html > index.jsp

33. <%@ taglib prefix = &quot;ajax&quot; uri = &quot;javawebparts/ajaxparts/taglib&quot; %> < html > < head > < title > Simple Hello World Example </ title > </ head > < body > < input id = &quot;hello-button&quot; type = &quot;button&quot; value = &quot;Say Hello World via AJAX&quot; /> < ajax:event attachTo = &quot;hello-button&quot; ajaxRef = &quot;index/hello-button&quot; /> < br />< br /> < div id = &quot;hello-div&quot; ></ div > < ajax:enable /> </ body > </ html > index.jsp

34. ajax-config.xml < ajaxConfig > < group ajaxRef = &quot;index&quot; > < element ajaxRef = &quot;hello-button&quot; > < event type = &quot;onclick&quot; > < requestHandler type = &quot;std:SimpleRequest&quot; target = &quot; index-result.txt &quot; > < parameter /> </ requestHandler > < responseHandler type = &quot;std:InnerHTML&quot; > < parameter > hello-div </ parameter > </ responseHandler > </ event > </ element > </ group > </ ajaxConfig >

35. Hello World! I am an AJAX result from the (mock) server. index-result.txt

36. <web-app> <context-param> <param-name> AjaxPartsTaglibConfig </param-name> <param-value> /WEB-INF/ajax-config.xml </param-value> </context-param> <context-param> <param-name> AjaxPartsTaglibValidateConfig </param-name> <param-value> false </param-value> </context-param> web.xml

41. public class IndexResult extends Action { public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { response.setContentType( &quot;text/html&quot; ); PrintWriter out = response.getWriter(); out.println( &quot;Hello World! “ + “ This is an AJAX response “ + “ from a Struts Action.&quot; ); out.flush(); return null ; } } actions.IndexResult.java

42. < action path = &quot;/index-result&quot; type = &quot;actions.IndexResult&quot; validate = &quot;false&quot; /> struts-config.xml

43. <requestHandler type=&quot;std:SimpleRequest&quot; target=&quot;index-result.txt&quot;> < requestHandler type = &quot;std:SimpleRequest&quot; target = &quot;/index-result.do&quot; > ajax-config.xml

46. public class IndexResult2 extends ActionSupport { private InputStream inputStream ; public InputStream getInputStream() { return inputStream ; } public String execute() throws Exception { inputStream = new StringBufferInputStream( &quot;Hello World! This is an AJAX response &quot; + &quot;from a Struts 2 Action.&quot; ); return SUCCESS ; } } actions.IndexResult2.java

47. < package name = &quot;ajaxwebparts&quot; extends = &quot;struts-default&quot; > < action name = &quot;index-result&quot; class = &quot;actions.IndexResult2&quot; > < result type = &quot;stream&quot; > < param name = &quot;contentType&quot; > text/html </ param > < param name = &quot;inputName&quot; > inputStream </ param > </ result > </ action > </ package > struts.xml

48. <requestHandler type=&quot;std:SimpleRequest&quot; target=&quot;/index-result.do&quot;> < requestHandler type = &quot;std:SimpleRequest&quot; target = &quot;/index-result.action&quot; > ajax-config.xml

53. < ajaxConfig > < group ajaxRef = &quot; index &quot; > < element ajaxRef = &quot; hello-button &quot; > < event type = &quot;onclick&quot; > < requestHandler type = &quot;std:SimpleRequest&quot; target = &quot; index-result.action &quot; > < parameter /> How does AjaxParts work? <body> < input id = &quot;hello-button&quot; type = &quot;button&quot; value = &quot;Say Hello World via AJAX&quot; /> < ajax:event attachTo = &quot;hello-button“ ajaxRef = &quot; index/hello-button &quot; />

54. < responseHandler type = &quot;std:InnerHTML&quot; > < parameter > hello-div </ parameter > </ responseHandler > < br />< br /> < div id = &quot; hello-div &quot; ></ div > </ body > < ajax:enable /> How does AjaxParts work?

76. <%@ taglib prefix = &quot;yui&quot; uri = &quot;/struts-yui-tags&quot; %> <%@ taglib prefix = &quot;s&quot; uri = &quot;/struts-tags&quot; %> < html > < head > < yui:head datepicker = &quot;true&quot; /> </ head > < body > < p > The selected date is < s:property value = &quot;datepicker&quot; /></ p > < s:form action = &quot;datepicker&quot; > < yui:datepicker id = &quot;datepicker&quot; name = &quot;datepicker&quot; /> < s:submit /> </ s:form > </ body > </ html > datepicker.jsp

77. < action name = &quot;datepicker&quot; class = &quot;actions.Datepicker&quot; > < result > datepicker.jsp </ result > </ action > struts.xml

78. public class Datepicker extends ActionSupport { private Date datepicker ; public Date getDatepicker() { return datepicker ; } public void setDatepicker(Date value) { datepicker = value; } } actions.DatePicker.java

83. Struts University Series